<input type="text" placeholder="请输入手机号" class="inp" name="uphone" id="uphone" style="width: 50%;">
var myreg=/^[1][3,4,5,7,8][0-9]{9}$/;
if(!myreg.test(uphone))
{
alert("请输入正确的手机号格式");
$("#uphone").focus();
return false;
}
摘自:https://blog.youkuaiyun.com/qq_42249896/article/details/83045247